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firmware.ino
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/*
emonPi Discrete Sampling
If AC-AC adapter is detected assume emonPi is also powered from adapter (jumper shorted) and take Real Power Readings and disable sleep mode to keep load on power supply constant
If AC-AC addapter is not detected assume powering from battereis / USB 5V AC sample is not present so take Apparent Power Readings and enable sleep mode
Transmitt values via RFM69CW radio
------------------------------------------
Part of the openenergymonitor.org project
Authors: Glyn Hudson & Trystan Lea
Builds upon JCW JeeLabs RF12 library and Arduino
Licence: GNU GPL V3
*/
/*Recommended node ID allocation
------------------------------------------------------------------------------------------------------------
-ID- -Node Type-
0 - Special allocation in JeeLib RFM12 driver - reserved for OOK use
1-4 - Control nodes
5-10 - Energy monitoring nodes
11-14 --Un-assigned --
15-16 - Base Station & logging nodes
17-30 - Environmental sensing nodes (temperature humidity etc.)
31 - Special allocation in JeeLib RFM12 driver - Node31 can communicate with nodes on any network group
-------------------------------------------------------b------------------------------------------------------
Change Log:
https://github.com/openenergymonitor/emonpi/blob/master/Atmega328/emonPi_RFM69CW_RF12Demo_DiscreteSampling/compiled/CHANGE%20LOG.md
emonhub.conf node decoder:
[[5]]
nodename = emonPi
firmware = emonPi_RFM69CW_RF12Demo_DiscreteSampling.ino
hardware = emonpi
[[[rx]]]
names = power1,power2,power1_plus_power2,Vrms,T1,T2,T3,T4,T5,T6,pulseCount
datacodes = h, h, h, h, h, h, h, h, h, h, L
scales = 1,1,1,0.01,0.1,0.1,0.1,0.1,0.1,0.1,1
units = W,W,W,V,C,C,C,C,C,C,p
*/
#define emonTxV3 // Tell emonLib this is the emonPi V3 - don't read Vcc assume Vcc = 3.3V as is always the case on emonPi eliminates bandgap error and need for calibration http://harizanov.com/2013/09/thoughts-on-avr-adc-accuracy/
#define RF69_COMPAT 1 // Set to 1 if using RFM69CW or 0 is using RFM12B
#include <JeeLib.h> // https://github.com/openenergymonitor/jeelib
#include <avr/pgmspace.h>
#include <util/parity.h>
ISR(WDT_vect) { Sleepy::watchdogEvent(); } // Attached JeeLib sleep function to Atmega328 watchdog -enables MCU to be put into sleep mode inbetween readings to reduce power consumption
#include "EmonLib.h" // Include EmonLib energy monitoring library https://github.com/openenergymonitor/EmonLib
EnergyMonitor ct1, ct2;
#include <OneWire.h> // http://www.pjrc.com/teensy/td_libs_OneWire.html
#include <DallasTemperature.h> // http://download.milesburton.com/Arduino/MaximTemperature/DallasTemperature_LATEST.zip
#include <Wire.h> // Arduino I2C library
#include <LiquidCrystal_I2C.h> // https://github.com/openenergymonitor/LiquidCrystal_I2C
LiquidCrystal_I2C lcd(0x27,16,2); // LCD I2C address to 0x27, 16x2 line display
const byte firmware_version = 25; //firmware version x 10 e.g 10 = V1.0 / 1 = V0.1
//----------------------------emonPi Settings---------------------------------------------------------------------------------------------------------------
boolean debug = TRUE;
const unsigned long BAUD_RATE= 38400;
const byte Vrms_EU= 230; // Vrms for apparent power readings (when no AC-AC voltage sample is present)
const byte Vrms_USA= 110; // USA apparent power VRMS
const int TIME_BETWEEN_READINGS= 5000; // Time between readings (ms)
const int RF_RESET_PERIOD= 60000; // Time (ms) between RF resets (hack to keep RFM60CW alive)
//http://openenergymonitor.org/emon/buildingblocks/calibration
const float Ical1= 90.9; // (2000 turns / 22 Ohm burden) = 90.9
const float Ical2= 90.9;
float Vcal_EU= 256.8; // (230V x 13) / (9V x 1.2) = 276.9 - Calibration for EU AC-AC adapter 77DE-06-09
const float Vcal_USA= 130.0; // Calibration for US AC-AC adapter 77DA-10-09
boolean USA= FALSE;
const byte min_pulsewidth= 110; // minimum width of interrupt pulse (default pulse output meters = 100ms)
const float phase_shift= 1.7;
const int no_of_samples= 1480;
const byte no_of_half_wavelengths= 20;
const int timeout= 2000; // emonLib timeout
const int ACAC_DETECTION_LEVEL= 3000;
const byte TEMPERATURE_PRECISION= 12; // 9 (93.8ms),10 (187.5ms) ,11 (375ms) or 12 (750ms) bits equal to resplution of 0.5C, 0.25C, 0.125C and 0.0625C
const byte MaxOnewire= 6; // maximum number of DS18B20 one wire sensors
boolean RF_STATUS= 1; // Turn RF on and off
//-------------------------------------------------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------------------------------------------------
//----------------------------emonPi V3 hard-wired connections---------------------------------------------------------------------------------------------------------------
const byte LEDpin= 9; // emonPi LED - on when HIGH
const byte shutdown_switch_pin = 8; // Push-to-make - Low when pressed
const byte emonpi_GPIO_pin= 5; // Connected to Pi GPIO 17, used to activate Pi Shutdown when HIGH
//const byte emonpi_OKK_Tx= 6; // On-off keying transmission Pin - not populated by default
//const byte emonPi_RJ45_8_IO= A6; // RJ45 pin 8 - Analog 6 (D19) - Aux I/O
const byte emonPi_int1= 1; // RJ45 pin 6 - INT1 - PWM - Dig 3 - default pulse count input
const byte emonPi_int1_pin= 3; // RJ45 pin 6 - INT1 - PWM - Dig 3 - default pulse count input
//const byte emonPi_int0= 2; // Default RFM INT (Dig2) - Can be jumpered used JP5 to RJ45 pin 7 - PWM - D2
#define ONE_WIRE_BUS 4 // DS18B20 Data, RJ45 pin 4
//-------------------------------------------------------------------------------------------------------------------------------------------
//Setup DS128B20
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);
byte allAddress [MaxOnewire][8]; // 8 bytes per address
byte numSensors;
//-------------------------------------------------------------------------------------------------------------------------------------------
//-----------------------RFM12B / RFM69CW SETTINGS----------------------------------------------------------------------------------------------------
byte RF_freq=RF12_433MHZ; // Frequency of RF69CW module can be RF12_433MHZ, RF12_868MHZ or RF12_915MHZ. You should use the one matching the module you have.
byte nodeID = 5; // emonpi node ID
int networkGroup = 210;
typedef struct {
int power1;
int power2;
int power1_plus_2;
int Vrms;
int temp[MaxOnewire];
unsigned long pulseCount;
} PayloadTX; // create JeeLabs RF packet structure - a neat way of packaging data for RF comms
PayloadTX emonPi;
//-------------------------------------------------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------------------------------------------------
//Global Variables Energy Monitoring
double Vcal, vrms;
boolean CT1, CT2, ACAC, DS18B20_STATUS;
byte CT_count, Vrms;
unsigned long last_sample=0; // Record millis time of last discrete sample
byte flag; // flag to record shutdown push button press
volatile byte pulseCount = 0;
unsigned long now =0;
unsigned long pulsetime=0; // Record time of interrupt pulse
unsigned long last_rf_rest=0; // Record time of last RF reset
// RF Global Variables
static byte stack[RF12_MAXDATA+4], top, sendLen, dest; // RF variables
static char cmd;
static word value; // Used to store serial input
long unsigned int start_press=0; // Record time emonPi shutdown push switch is pressed
const char helpText1[] PROGMEM = // Available Serial Commands
"\n"
"Available commands:\n"
" <nn> i - set node IDs (standard node ids are 1..30)\n"
" <n> b - set MHz band (4 = 433, 8 = 868, 9 = 915)\n"
" <nnn> g - set network group (RFM12 only allows 212, 0 = any)\n"
" <n> c - set collect mode (advanced, normally 0)\n"
" ...,<nn> a - send data packet to node <nn>, request ack\n"
" ...,<nn> s - send data packet to node <nn>, no ack\n"
" ...,<n> p - Set AC Adapter Vcal 1p = UK, 2p = USA\n"
" v - Show firmware version\n"
;
//-------------------------------------------------------------------------------------------------------------------------------------------
// SETUP ********************************************************************************************
//-------------------------------------------------------------------------------------------------------------------------------------------
void setup()
{
delay(100);
if (USA==TRUE)
{
Vcal = Vcal_USA; // Assume USA AC/AC adatper is being used, set calibration accordingly
Vrms = Vrms_USA;
}
else
{
Vcal = Vcal_EU;
Vrms = Vrms_EU;
}
emonPi_startup(); // emonPi startup proceadure, check for AC waveform and print out debug
if (RF_STATUS==1) RF_Setup();
byte numSensors = check_for_DS18B20(); // check for presence of DS18B20 and return number of sensors
emonPi_LCD_Startup();
delay(1500);
CT_Detect();
serial_print_startup();
attachInterrupt(emonPi_int1, onPulse, FALLING); // Attach pulse counting interrupt on RJ45 (Dig 3 / INT 1)
emonPi.pulseCount = 0; // Reset Pulse Count
ct1.current(1, Ical1); // CT ADC channel 1, calibration. calibration (2000 turns / 22 Ohm burden resistor = 90.909)
ct2.current(2, Ical2); // CT ADC channel 2, calibration.
if (ACAC) //If AC wavefrom has been detected
{
ct1.voltage(0, Vcal, phase_shift); // ADC pin, Calibration, phase_shift
ct2.voltage(0, Vcal, phase_shift); // ADC pin, Calibration, phase_shift
}
} //end setup
//-------------------------------------------------------------------------------------------------------------------------------------------
// LOOP ********************************************************************************************
//-------------------------------------------------------------------------------------------------------------------------------------------
void loop()
{
now = millis();
if (USA==TRUE)
{
Vcal = Vcal_USA; // Assume USA AC/AC adatper is being used, set calibration accordingly
Vrms = Vrms_USA;
}
else
{
Vcal = Vcal_EU;
Vrms = Vrms_EU;
}
// Update Vcal
ct1.voltage(0, Vcal, phase_shift); // ADC pin, Calibration, phase_shift
ct2.voltage(0, Vcal, phase_shift); // ADC pin, Calibration, phase_shift
if (digitalRead(shutdown_switch_pin) == 0 )
digitalWrite(emonpi_GPIO_pin, HIGH); // if emonPi shutdown butten pressed then send signal to the Pi on GPIO 11
else
digitalWrite(emonpi_GPIO_pin, LOW);
if (Serial.available()){
handleInput(Serial.read()); // If serial input is received
double_LED_flash();
}
if (RF_STATUS==1){ // IF RF module is present and enabled then perform RF tasks
if (RF_Rx_Handle()==1) { // Returns true if RF packet is received
double_LED_flash();
}
send_RF(); // Transmitt data packets if needed
if ((now - last_rf_rest) > RF_RESET_PERIOD) {
rf12_initialize(nodeID, RF_freq, networkGroup); // Periodically reset RFM69CW to keep it alive :-(
}
}
if ((now - last_sample) > TIME_BETWEEN_READINGS)
{
single_LED_flash(); // single flash of LED on local CT sample
if (ACAC && CT1) // Read from CT 1
{
ct1.calcVI(no_of_half_wavelengths,timeout); emonPi.power1=ct1.realPower;
emonPi.Vrms=ct1.Vrms*100;
}
else
{
if (CT1) emonPi.power1 = ct1.calcIrms(no_of_samples)*Vrms; // Calculate Apparent Power 1 1480 is number of samples
}
if (ACAC && CT2) // Read from CT 2
{
ct2.calcVI(no_of_half_wavelengths,timeout); emonPi.power2=ct2.realPower;
emonPi.Vrms=ct2.Vrms*100;
}
else
{
if (CT2) emonPi.power2 = ct2.calcIrms(no_of_samples)*Vrms; // Calculate Apparent Power 1 1480 is number of samples
}
emonPi.power1_plus_2=emonPi.power1 + emonPi.power2; //Create power 1 plus power 2 variable for US and solar PV installs
if ((ACAC==0) && (CT_count > 0)) emonPi.Vrms=Vrms*100; // If no AC wave detected set VRMS constant
if ((ACAC==1) && (CT_count==0)) { // If only AC-AC is connected then return just VRMS calculation
ct1.calcVI(no_of_half_wavelengths,timeout);
emonPi.Vrms=ct1.Vrms*100;
}
//Serial.print(emonPi.pulseCount); Serial.print(" ");delay(5);
// if (debug==1) {Serial.print(emonPi.power2); Serial.print(" ");delay(5);}
if (DS18B20_STATUS==1)
{
sensors.requestTemperatures(); // Send the command to get temperatures
for(byte j=0;j<numSensors;j++) emonPi.temp[j]=get_temperature(j);
}
if (pulseCount) // if the ISR has counted some pulses, update the total count
{
cli(); // Disable interrupt just in case pulse comes in while we are updating the count
emonPi.pulseCount += pulseCount;
pulseCount = 0;
sei(); // Re-enable interrupts
}
/*
Serial.print(CT1); Serial.print(" "); Serial.print(CT2); Serial.print(" "); Serial.print(ACAC); Serial.print(" "); Serial.println (CT_count);
Serial.print(emonPi.power1); Serial.print(" ");
Serial.print(emonPi.power2); Serial.print(" ");
Serial.print(emonPi.Vrms); Serial.print(" ");
Serial.println(emonPi.temp[1]);
*/
send_emonpi_serial(); //Send emonPi data to Pi serial using struct packet structure
last_sample = now; //Record time of sample
} // end sample
} // end loop---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
void single_LED_flash()
{
digitalWrite(LEDpin, HIGH); delay(50); digitalWrite(LEDpin, LOW);
}
void double_LED_flash()
{
digitalWrite(LEDpin, HIGH); delay(25); digitalWrite(LEDpin, LOW);
digitalWrite(LEDpin, HIGH); delay(25); digitalWrite(LEDpin, LOW);
}